期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 425, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.127906
关键词
Hazardous biowastes; Beneficial applications; Acidic substrates; Aerobic composting; Nutrient recovery
资金
- National Key Technology Research and Development Program of China [2017YFD0800202]
- National Natural Science Foundation of China [31401944]
- Sino-German DFG International Research Training Group [IRTG 2366]
- special project of cooperative seed fund of the world's top agricultural universities and China Agricultural University [1031-10020799]
- Taif University, Saudi Arabia [TURSP-2020/65]
Adding acidic substrates (ASs) can enhance humification and thermal stability of swine manure compost, leading to improved recovery of organic matter and phosphorus. ASs increase the formation of struvite crystals, enhancing phosphorus recovery efficiency, and influence microbial succession during composting.
Improving the recovery of organic matter and phosphorus (P) from hazardous biowastes such as swine manure using acidic substrates (ASs) in conjunction with aerobic composting is of great interest. This work aimed to investigate the effects of ASs on the humification and/or P migration as well as on microbial succession during the swine manure composting, employing multivariate and multiscale approaches. Adding ASs, derived from wood vinegar and humic acid, increased the degree of humification and thermal stability of the compost. The P-31 nuclear magnetic resonance spectroscopy and X-ray absorption near-edge structure analyses demonstrated compost P was in the form of struvite crystals, Ca/Al-P phases, and Poly-P (all inorganic P species) as well as inositol hexakisphosphate and Mono-P (organophosphorus species). However, the efficiency of P recovery could be improved by generating more struvite by adding the ASs. The flows among nutrient pools resulted from the diversity in the dominant microbial communities in different composting phases after introducing the ASs and appearance of Bacillus spp. in all phases. These results demonstrate the potential value of ASs for regulating and/ or improving nutrients flow during the composting of hazardous biowastes for producing higher quality compost, which may maximize their beneficial benefits and applications.
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